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' CNAPTERTWO Proposed Action and Alternawes <br />' plan would likely be adjusted when cavity growth rate and ultimate cavity diameter have been <br />adequately demonstrated. <br />' Solution Piping <br />Well field piping would consist of the main header system that crosses the well field azea and <br />feeds into the initial processing plant. Off the main header system, a series of lateral pipe <br />systems would be routed into different azeas of the well field to connect to the individual wells. <br />The pipes would be insulated and, because there would be thermal expansion and contraction on <br />the lines, it would be necessary to place the pipes on pipe racks so that the insulation would not <br />be damaged by contact with the ground. A pumping station would be located at the western edge <br />of the well field to pump the collected fluid to the initial processing plant. The pumping station <br />' would include solution pumps and a control panel. The pumps would be skid mounted and <br />enclosed by a metal building on an azea measuring approximately 48 feet long by 16 feet wide. <br />t The pump station would be accompanied by two skid-mounted transformers that would tap <br />power from the 15-kV distribution line and reduce the voltage for use by the solution pumps. <br />The electrical distribution line is described in Section 2.2.1.3. Each transformer would be skid <br />' mounted on an azea measuring 10 feet by 20 feet. The total surface azea occupied by the <br />pumping station and transformers would be about 1,200 squaze feet. <br />The main header pipe racks would be located along the main well field access road in each <br />' mining panel. In the 0-5 yeaz panel, the total length of the main header pipe system is estimated <br />to be 8,500 feet. The length of the lateral piping systems is estimated at 6,400 feet, and the <br />' individual well piping system is estimated to be 3,900 feet. The main header and lateral systems <br />would require a cleazed condor width of ] 0 feet and an additional 10 feet of corridor for <br />construction. The individual well piping would require a cleazed corridor of 8 feet and an <br />' additional 8 feet for construction. The pipe racks would have 16-foot-high vehicle cleazance in <br />the immediate processing plant azea and would be placed approximately 18 inches off the ground <br />within the well field azea. The main header pipe rack would be 8.5 feet wide and a minimum of <br />3 feet aboveground at the top of the rack. The lateral and individual well pipe racks would be 6.5 <br />feet wide and a minimum of 2.5 feet tall. <br />' Piping from the individual wells to the lateral lines would be constructed as wells aze developed <br />in the two-pass mining sequence. As wells aze retired, this piping would be removed and reused <br />for new wells. The piping from the wells to the lateral lines would also be placed on low pipe <br />' racks and would generally be constructed along the access roads. <br />The general approach to vegetative clearing for the well field piping would be to remove only <br />that vegetation necessary for access and construction. For purposes of analysis in the <br />' Environmental Impact Statement (EIS), it is assumed that all vegetation would be removed from <br />the corridor. In actuality, low-lying vegetation (e.g., grasses) would probably remain over much <br />of the corridor, and woody vegetation would remain wherever possible within the construction <br />' corridor. Soil disturbance would occur only where local topography requires minor grading <br />adjustments to allow uniform piping and where support pilings aze placed. No substantial cut <br />and fill is expected for the well field piping, but some would occur, if necessary. For purposes of <br />analysis in the EIS, it is assumed that some soil disturbance would occur over 80 percent of the <br />' 27 <br />